Article Number: 000138091

Cannot create link aggregation 802.3ad team in Broadcom Control Suite (BACS) with iSCSI offload enabled

Summary: This article contains information about the inability to create a link aggregation team when iSCSI offload is enabled.

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Article Content

Symptoms

Issue:

Unable to create a 802.3ad Link Aggregation (LAG) team in Broadcom Control Suite (BACS).

Cause

N/A

Resolution

Solution:

Disable iSCSI by deselecting iSCSI Offload Engine from the Resource Reservations section under the
Configurations tab.

Steps:

Warning: This article presumes that TCP Offload Engine (TOE) and Receive Side Scaling (RSS) are disabled in Windows. If they are, then the iSCSI and TOE offloading options do not appear in BACS.

I. Enable RSS and TOE at the command prompt

   a. Server 2008 R2 and earlier - Press Start -> All Programs -> Accessories. Locate Command Prompt;
       right-click and select 'run as administrator'.

   b. Server 2012 and later - Press the Windows key + Q, and type 'cmd' in the 'search' box. Right-click
       on the 'command prompt' icon when displayed, and select 'run as administrator' from the menu.

        i. Enable the TOE chimney in Windows Server 2003

           1. netsh int ip set chimney enabled

       ii. Enable TOE and RSS in Server 2008 and later

           1. netsh int tcp set global chimney=enabled

           2. netsh int tcp set global rss=enabled

II. Disable TOE and iSCSI on each team member

     a. From the BACS menu filter bar, change the views to 'NDIS/L2NIC' and 'Configuration'.
         Select the first NIC to be teamed.

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      b. From the right actions menu, select the 'Configuration' tab. Under the 'Property' choices,
          expand 'Resource Reservations'.

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      c. Once the property screen is displayed, click 'Configure'.

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      d. Under 'Protocols', clear the iSCSI checkbox. Under 'Resource Reservations' uncheck the
           TCP Offload Engine (TOE) checkbox and click 'Next'.

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      e. At the 'Commit Changes' screen, click 'Apply'. If the NIC is already connected, there will be a
           brief interruption in service.

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      f. Changes may be confirmed at the main BACS screen by expanding 'Resource Reservations'.

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      g. Repeat Steps a-f for the subsequent team member NICs. When finished, exit the BACS utility.

III. Create the Link Aggregation 802.3ad team

        a. Restart BACS and create the Link Aggregation team.

IV.   Disable RSS and TOE at the command prompt (see Step I above)

        a. Disable the TOE chimney in Windows Server 2003

             i. netsh int ip set chimney disabled

        b. Disable TOE and RSS in Server 2008 and later

             i. netsh int tcp set global chimney=disabled

           ii. netsh int tcp set global rss=disabled